在React中单击子元素调用父事件侦听器

Question

我正在进行搜索输入，人们可以在其中寻找技能，然后从选项中选择一项技能。但是，当我单击任何选项时，它会调用父元素(onBlur={() => setIsFocus(false)})的事件侦听器。当我删除这个事件侦听器时，它会添加一个新技能，但是当它存在时，它不会运行附加到子元素的函数。

我试图将e.stopPropagtion()添加到子元素，但它不起作用。

我代码:

import { useRef, useState } from "react"
import fetchSkills from "../api"
import BaseInput from "../components/reusable/BaseInput"
import SkillsSuggestionList from "../components/solutions/SkillsSuggestionList"
import Icons from "../components/SvgIcons/Icons"
import { debounce } from "../utils/shared"
const SKILLS = [
{ name: "html" },
{ name: "css" },
{ name: "javascript" },
{ name: "bootstrap" },
{ name: "tailwind-css" },
{ name: "react" },
{ name: "vue" },
{ name: "angular" },
]
const SolutionForm = () => {
const [skills, setSkills] = useState([])
const [isFocus, setIsFocus] = useState(false)
const selectRef = useRef(null)
// fetch skills and render them in a SkillsSuggestionList component
const handleSelectChange = async (e) => {
const { value } = e.target
if (value.length > 2) {
const result = await fetchSkills(value)
setSkills(result.items)
}
}
const addSkill = (skill) => {
setData({
...data,
skills: [...data.skills, skill],
})
setIsFocus(false)
setSkills([])
selectRef.current.value = ""
}
return (
<div>
<div>
<form onSubmit={handleSubmit}>
<div
key={input.name}
onBlur={() => setIsFocus(false)} // this is a parent event listener
>
<div
key={input.name}
>
<ul>
{data.skills.map((skill, index) => (
<li key={index}>
{skill}
</li>
))}
</ul>
<BaseInput
onChange={debounce(handleSelectChange, 500)}
onFocus={() => setIsFocus(true)}
name={input.name}
innerRef={selectRef}
/>
</div>
{isFocus && (
<SkillsSuggestionList
skills={skills.length > 0 ? skills : SKILLS}
addSkill={addSkill}
/>
)}
</div>
</form>
</div>
</div>
)
}
export default SolutionForm

SkillSuggestionList组件:

const SkillsSuggestionList = ({ skills, addSkill }) => {
return (
<ul
id="skills"
>
{skills.map((skill) => (
<li
onClick={(e) => { // this is a child event listener
e.stopPropagation()
addSkill(skill.name)
}}
key={skill.name}
>
{skill.name}
</li>
))}
</ul>
)
}
export default SkillsSuggestionList

Answer 1

使用onMouseDown代替onClick可以达到这个效果。

{skills.map((skill) => (
<li
onMouseDown={(e) => { // this is a child event listener
// e.stopPropagation() <--- this won't be needed
addSkill(skill.name)
}}
key={skill.name}
>
{skill.name}
</li>
))}

另外，让我解释一下为什么这里需要onMouseDown。当您单击列表时，在onClick运行之前，它会变得模糊，并且该功能不再可用。所以当你使用onMouseDown时它会首先运行addSkill函数然后模糊它。希望它能成功。